(Revised 2011-03-14)
13
All LEDs will flash ON Momentarily. Verify the Power LED stays ON (GREEN).
Note:
Either V
1
or V
2
can be connected to power for minimal operation. For redundant power operation, V
1
and V
2
plugs must be connected to separate DC Voltage sources. Use wire sizes of 12-28 gauge. The power cord should be
limited to less than 10 meters in order to ensure optimum performance.
Recommended 24V DC Power Supplies, similar to:
100-240VAC: N-Tron NTPS-24-1.3, DC 24V/1.3A
N-TRON SWITCH GROUNDING TECHNIQUES FOR 100 SERIES
The grounding philosophy of any control system is an integral
part of the design. N-Tron switches are designed to be grounded,
but the user has been given the flexibility to float the switch
when required. The best noise immunity and emissions (i.e. CE)
are obtained when the N-Tron switch chassis is connected to
earth ground via a drain wire. Some N-Tron switches have metal
din-rail brackets that can ground the switch if the din-rail is
grounded. In some cases, N-Tron switches with metal brackets
can be supplied with optional plastic brackets if isolation is
required.
Users may run a drain wire & lug from the screw provided on the
back face of the enclosure. In the event the provided grounding
screw has been lost, care should be taken to limit the penetration
of the outer skin by less than 1/4". Failure to do so may cause
irreversible damage to the internal components of the switch.
Note: Ensure the power supply is grounded properly before
applying power to the grounded switch. This may be verified by
using a voltmeter to determine that there is no voltage difference
between the power supply’s negative output terminal and the
chassis grounding point of the switch.
As an alternative grounding method, both V- legs of the
power input connector are connected to chassis internally on
the PCB. Connecting a drain wire to earth ground from one
of the V- terminal plugs as shown here will ground the
switch and the chassis. The power leads from the power
source should be limited to 3 meters or less in length.
If the use of shielded cables is required, it is generally
recommended to only connect the shield at one end to
prevent ground loops and interfere with low level signals
(i.e. thermocouples, RTD, etc.). Cat5e cables manufactured
to EIA-568A or 568B specifications are required for use
with N-Tron Switches.
110FX2, 111FX3, 112FX4, 114FX6 and 116TX
DRAIN WIRE WITH LUG CONNECTING SWITCH
CHASSIS TO KNOWN GOOD GROUNDING POINT
102MC, 104TX, 105TX, 105FX, 106FX2 and
108TX
